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Table 2 Patient characteristics

From: Overall intact cognitive function in male X-linked adrenoleukodystrophy adults with normal MRI

  Number of patients (%) or median (range) Number of Dutch male population (%) or median (range)a
N (Total) 33 5,446,000
Age in years 44 (19–71) (15–100)
Education
 1: < Primary education 0 (0) 0 (0)
 2: Primary education 0 (0) 464,000 (8.5)
 3: < Lower vocational education 1 (3) 302,000 (5.5)
 4. Lower vocational education 2 (6.1) 1,290,500 (23.7)
 5. Secondary vocational education 14 (42.4) 1,272,500 (23.4)
 6. (higher) Secondary education or university of applied sciences 14 (42.4) 1,507,000 (27.7)
 7. University bachelor or masters degree. 2 (6.1) 610,000 (11.2)
MRI
 Normal MRI (no lesions) 15 (45.5)  
 MRI with ALD lesions 4 (12.1)  
 MRI with vascular lesions 12 (36.4)  
 MRI with other lesions 2 (6.1)  
  1. Education scores are measured according to Verhage’s (1983) educational classification system [28]
  2. a Data from the Dutch male population (2016) derived from CBS (Central Statistical Office Netherlands) and is available online [28]